diff --git a/components/selectors/parser.rs b/components/selectors/parser.rs
index 9acdc36ff0d..0cb7c6e3f47 100644
--- a/components/selectors/parser.rs
+++ b/components/selectors/parser.rs
@@ -176,26 +176,6 @@ pub trait Parser<'i> {
     }
 }
 
-#[derive(PartialEq, Eq, Clone, Debug)]
-pub struct SelectorAndHashes<Impl: SelectorImpl> {
-    pub selector: Selector<Impl>,
-    pub hashes: AncestorHashes,
-}
-
-impl<Impl: SelectorImpl> SelectorAndHashes<Impl> {
-    pub fn new(selector: Selector<Impl>) -> Self {
-        let hashes = AncestorHashes::new(&selector);
-        Self::new_with_hashes(selector, hashes)
-    }
-
-    pub fn new_with_hashes(selector: Selector<Impl>, hashes: AncestorHashes) -> Self {
-        SelectorAndHashes {
-            selector: selector,
-            hashes: hashes,
-        }
-    }
-}
-
 #[derive(PartialEq, Eq, Clone, Debug)]
 pub struct SelectorList<Impl: SelectorImpl>(pub Vec<Selector<Impl>>);
 
diff --git a/components/style/selector_map.rs b/components/style/selector_map.rs
index 8b77dd01290..0a7ebb65612 100644
--- a/components/style/selector_map.rs
+++ b/components/style/selector_map.rs
@@ -14,7 +14,7 @@ use pdqsort::sort_by;
 use rule_tree::CascadeLevel;
 use selector_parser::SelectorImpl;
 use selectors::matching::{matches_selector, MatchingContext, ElementSelectorFlags};
-use selectors::parser::{Component, Combinator, SelectorAndHashes, SelectorIter};
+use selectors::parser::{Component, Combinator, SelectorIter};
 use selectors::parser::LocalName as LocalNameSelector;
 use smallvec::VecLike;
 use std::collections::HashMap;
@@ -28,12 +28,6 @@ pub trait SelectorMapEntry : Sized + Clone {
     fn selector(&self) -> SelectorIter<SelectorImpl>;
 }
 
-impl SelectorMapEntry for SelectorAndHashes<SelectorImpl> {
-    fn selector(&self) -> SelectorIter<SelectorImpl> {
-        self.selector.iter()
-    }
-}
-
 /// Map element data to selector-providing objects for which the last simple
 /// selector starts with them.
 ///